Double-twist spindle



Sept. 9, 1952 P. DE`HALLEUX 2,609,652

DOUBLE-TWIST SPINDLE Filed oct. 19, 1949 'IA Isl INVENTOR. F'ERRE DE HALLEUX BY. #mL/ WW Patented Sept. 9, 1952 A A e nonnen-TWIST 4SPINDLE e h Pierre kde Halleux,- Brussels, 'lielgiunn assignor to QUniondes Fabriqueselgesfde Textiles Aitiiciels Fabelta,- Societe Anonyme, Brussels, r

" vApcreation october-19, 1949, serias No. 122,255

This inventionrelates to hollow spindles which, by rotatingl at a high speed, give a double-twist to the yarn.

When the twisting of the yarn is effected with such spindles, either by winding the yarn or by reeling it on" a bobbin which is kept stationary on the spindle, theyarn, under the action of the centrifugal force to which it is subjected, acquires a position of equilibrium and formsv a balloon the diameter.. of which depends on .the speed of rotation, on the thickness of the yarn, onthe tension to-which the yarn is subjected and on 'the distance between thevpoint at which the yarn leaves the spindle and the-vflxed'rguide whichis mounted in the axis of 'said spindle.

When the spindle is to be driven at high speed and when a fairly thick yarn, such as is obtained Vby assembling a plurality offsingle threads, is

twisted, theA balloon diameter rapidly becomes so large as to cause interference between the yarns of` two adjacent spindles if thespacing between the latter is not increased, such an increase not always being possible to realize and which, in any case, involves an increase of the requisite floorspace of the machine. There have been attempts to prevent the yarns of neighbouring spindles from interfering with each other by positioning between the spindles so-called anti-lfna'rriagey partitions, which partitions prevent the yarns of two adjacent spindles from getting accidently entangled but they can not prevent an increase of the ballooning taking place due to some change in the twisting conditions, and it then happens that the yarn rubs against the surface of the partitions so that yarn breakages, which lower the quality of said yarn, occur.

In general, a control of the diameter of the balloon is effected by increasing the tension of the yarn by applying a braking action at a point positioned near the supply body, which tension must be increased With an increase in yarn thickness. In this manner packages are obtained the hardness of which depends on the tension that is applied to the yarn. It also has been suggested to use a storing ring positioned at the exit end of the spindle on which ring the yarn is wound and from which it is unwound following instantaneous variations of the tension. However, this winding brings about an increase in the total tension exerted cn the yarn.

Devices are known in which a split stirrup or fork rotating with the spindle keeps the yarn in a plane passing through the exit opening of the spindle and the upper fixed point but such devices can not limit the diameter of the balloon.

jsclaims. (c1. arf-sc) n f In Belgium October 26,1948

It has also been.' proposed to limit'thediameter of the balloon by means of a'split ring mount- Y ed on aconical top cover Haring outward fromthe exit hole of the spindle on which top cover the yarn can wind itself so that evenA if this winding is limited a small tensi'onldue to friction iscreated...A f N v The present invention :aims to remedysthese drawbacks' .by limiting .the diameterof the bal-A loon without having'tofapply .a braking action to theyarn delivered by the yarn supply body,.tc aln low the spindle'v .toJbe rotated at high speedrirrespective of the weight of the supply body and also to obtain packages which can be adjusted to the desired hardness byimeans of devices known .per w se,said devices being independent of the twisting spindle. f

With this object in view, thespindle of this invention is characterised by--fa continuous surface `which is exteriorA to the-yarn and ,Whichpro- Y tates concurrently with. the spindle so as to guide the yarn from the exit opening of the spindle to a point near the stationary yarn guide mounted in the axis of the spindle.

In the practical realization of this invention, the guiding surface may consist of a flexible or rigid tube joined to the rotating spindle through which tube the yarn is threaded.

The accompanying drawing given by way of example illustrates various devices, by vno means limitative, for realizing the invention.

Figure 1 is a schematic representation of a device constructed according to this invention.

Figure 2 represents a horizontal or inclined spindle. f

Figs. 3 and 4 respectively are side sectional and detail views of another embodimentJ of the invention.

In Fig. 2 the bobbin 'u is mounted on a carrier 'l supported by the spindle 3; the rotation of said bobbin being independent of that of the spindle due to the presence of bearings S. The carrier 'l is rendered stationary by means of a balance weight 9. The yarn l reeled-oi the bobbin is guided by spindle-cap IB. It enters the bore of the spindle 3 and leaves it through a side opening 5. The yarn is then threaded into a flexible tube I l (corresponding to the surface 2 of Figure l) fixed at point I2 of the spindle il and at point E3 in a carrier rotating freely in the stationary yarn guide l in bearing ld. The rotation of the tube is balanced by theA balance-weight l-l.

Irrespective of the speed of rotation and the weight of the yarn, the position the yarn will 3 assume in the space is determined by the length given to the flexible tube.

Figures 3 and 4 illustrate the bobbin G mounted on a support 'I carried by the spindle 3, the former being independent of the movement of the latter by virtue of bearings 8. The support 'I is immobilized by balance-weight 9. The yarn I wound ofi the bobbin and guided by the spindle cap i enters the bore of the spindle 3 and leaves it through the side opening 5. It is then threaded into a rigid tube l'! (similar to the flexible tube Il, and corresponding to the surface 2 of Fig. 1) xed insidel a bowl I8 forming an integral part of the spindle 3; the yarn being thereby guided to the fixed yarn guide 4.

No tensioning of the yarn is required inv order to counterbalance the action of the centrifugal force. The device of the present invention affords a means to adjust, as desired, the hardness of the end package through any known thread tensioning device located at some point along, the course of; ,the yarn gui-de fixed to thel end package (not shown).

I claim:

l. A device for limiting the size ofV the balloon of yarn in double-twist spindles comprising, in combination, a substantially cup-shaped vbody member iXedly connected at one end thereof to the, spindlev so as to rotate therewith and terminating at the other end thereof adjacent to a yarn guide, said body member having a curved inner surface formed and extending at least partially about the. axisv of rotation of the spindle` and the yarn, as it passes from the spindle to the yarn guide, bearing against said inner surface.

2. A device for limiting the` sizeof the balloon of yarn in double-twist spindles comprising, in combination, bodyA member having an inner oval-shaped surface symmetrically located about a longitudinal axis of the body member, said body member terminating at one end thereof adjacent to a yarn guide and being xedly connected at its other end to the spindle so that the body member rotates with the spindle and the yarn issuing from the spindle contacts the inner oval-shaped surface of the body member so as to be guided thereby and pass from said body member to said yarn guide, and the longitudinal axis of said body member coinciding with the axis of rotation of said spindle.

3 A device for limiting the size ofy the balloon of yarnV in double-twist spindles comprising, in combination, a substantially cylindrical hollow body member` having one end closed and the other; end open, said closed end being xedly connected to the spindle so that said body member rotates therewith and the longitudinal axis of said cylindrical body member coinciding with the axis of rotation of said spindle, whereby the yarn issuing from the spindle may be guided along the inner surface of the vcy-lindria 1 body member so as to thereby limit the sz of the balloon of yarn.

PIERRE DE REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Namel Date 1,981,134 Weaver V Nov. 20, 1934 2,010,888 Pool Aug. 13, 1935 2,143,417 Johannessen et al. Jan, 10, 1939 FOREIGN PATENTS Number Country Date 11,344 Germany Oct. 26, 1880 546,553 Germany Mar. l2, 1932 406,806 Great Britain Mar. 8, 1934l 

